Thanks Arcturus!
the joystiq was just an example, the problem with them as listed in the site is:
"Difficulty Rating indicates challenge for an average player to collect a majority of Trophies in a game. Games may feature individual Trophies of greater difficulty."
But look at this in ps3trophies.com:
http://www.ps3trophies.com/games/all/all
I really agree with them, there they have a scale of 0 to 10 stars. We could "make round' (I don´t know if this expression is right...) of the grades. Like, we´d work with always adding 0,5 (4,0 - 4,5 - 5,0 - 5,5 - 6,0 - etc..). They have a good library of games. The problem it´d be that the rating is for votes, so, it could always change...
I´ll keep looking for a site.
And as you said, the major problem is the work involved to do this. But I´m sure that if something like this were added, you wouldn´t have to uptade every week. It would be something more monthly I think. Like, in the first week of each month...
But I´ll try to think about something for this too.
Essay Pro